From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00E50C433E0 for ; Fri, 26 Mar 2021 20:38:48 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DB33861945 for ; Fri, 26 Mar 2021 20:38:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB33861945 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BD49D6F491; Fri, 26 Mar 2021 20:38:44 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0F99F6F491 for ; Fri, 26 Mar 2021 20:38:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1616791120; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kmJWUQTnyNyF1uUV1/UTgNBKp8byMNl0QTWnDQNcXzM=; b=JQ2wuZ3rABcbgmuoYPkS6AyhZ5P5Bm8htVx9DnTQpqgVmUT9T6OQi/pcRJ5/9gUGaag5IO bd0MeZdNQ5dw1rBZwP6pe0T+GFRFW5TVx1RVP3JWcOindnvaPOsLPqGWwL3WNUd9nQnvuy hd88V6Ztl7DbsGERp8jcIZ2MKsl/244= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-205-YxUCerzBOUCJkjvHCXR8Tg-1; Fri, 26 Mar 2021 16:38:25 -0400 X-MC-Unique: YxUCerzBOUCJkjvHCXR8Tg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 36385501EC; Fri, 26 Mar 2021 20:38:23 +0000 (UTC) Received: from Whitewolf.lyude.net (ovpn-114-133.rdu2.redhat.com [10.10.114.133]) by smtp.corp.redhat.com (Postfix) with ESMTP id 058795DDAD; Fri, 26 Mar 2021 20:38:21 +0000 (UTC) From: Lyude Paul To: nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Date: Fri, 26 Mar 2021 16:37:49 -0400 Message-Id: <20210326203807.105754-3-lyude@redhat.com> In-Reply-To: <20210326203807.105754-1-lyude@redhat.com> References: <20210326203807.105754-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Subject: [Intel-gfx] [PATCH v2 02/20] drm/tegra: Don't register DP AUX channels before connectors X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , open list , Jonathan Hunter , "open list:DRM DRIVERS FOR NVIDIA TEGRA" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" As pointed out by the documentation for drm_dp_aux_register(), drm_dp_aux_init() should be used in situations where the AUX channel for a display driver can potentially be registered before it's respective DRM driver. This is the case with Tegra, since the DP aux channel exists as a platform device instead of being a grandchild of the DRM device. Since we're about to add a backpointer to a DP AUX channel's respective DRM device, let's fix this so that we don't potentially allow userspace to use the AUX channel before we've associated it with it's DRM connector. Signed-off-by: Lyude Paul --- drivers/gpu/drm/tegra/dpaux.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c index 105fb9cdbb3b..ea56c6ec25e4 100644 --- a/drivers/gpu/drm/tegra/dpaux.c +++ b/drivers/gpu/drm/tegra/dpaux.c @@ -534,9 +534,7 @@ static int tegra_dpaux_probe(struct platform_device *pdev) dpaux->aux.transfer = tegra_dpaux_transfer; dpaux->aux.dev = &pdev->dev; - err = drm_dp_aux_register(&dpaux->aux); - if (err < 0) - return err; + drm_dp_aux_init(&dpaux->aux); /* * Assume that by default the DPAUX/I2C pads will be used for HDMI, @@ -589,8 +587,6 @@ static int tegra_dpaux_remove(struct platform_device *pdev) pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); - drm_dp_aux_unregister(&dpaux->aux); - mutex_lock(&dpaux_lock); list_del(&dpaux->list); mutex_unlock(&dpaux_lock); @@ -723,6 +719,10 @@ int drm_dp_aux_attach(struct drm_dp_aux *aux, struct tegra_output *output) unsigned long timeout; int err; + err = drm_dp_aux_register(aux); + if (err < 0) + return err; + output->connector.polled = DRM_CONNECTOR_POLL_HPD; dpaux->output = output; @@ -760,6 +760,7 @@ int drm_dp_aux_detach(struct drm_dp_aux *aux) unsigned long timeout; int err; + drm_dp_aux_unregister(aux); disable_irq(dpaux->irq); if (dpaux->output->panel) { -- 2.30.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx